分生组织的细胞一般排列（），细胞壁薄，由纤维素构成。A、紧密 B、松驰 C、有序 D、无序

The population of elephant seals, reduced by hunting to perhaps a few dozen animals early in this century, has soared under federal protection during the last few decades. However, because the species repopulated itself through extensive inbreeding, it now exhibits a genetic uniformity that is almost unparalleled in other species of mammals, and thus it is in far greater danger of becoming extinct than are most other species.
Given the information in the passage above, which of the following is most likely the reason that other species of mammals are leas likely than elephant seals to become extinct ？（）

A．Other species of mammals have large populations, so the loss of a few members of the species is not significant.

B．Other species of mammals have increased their knowledge of dangers through the experience of generation after generation of animals.

C．In other species of mammals, hunters can readily distinguish between males and females or between young animals and adults.

D．In other species of mammals, some members of the species am genetically better equipped to withstand a disease or event that destroys other members of the species.

E．Other species of mammals have retained habits of caution and alertness because they have not been protected as endangered species.

加标回收率的测定可以反映测试结果的（）

继北京奥运会______世界之后，“神州七号”今晚的起航，也被外媒形象地称为“太空夺金”。这个比喻并不恰切，“神州七号”的升空，以及中国人首次在太空留下足印的太空漫步，______只是参与太空技术竞争那么简单。 填入划横线部分最恰当的一项是( )。

A．感叹 并非

B．感叹 绝非

C．惊艳 绝非

D．惊艳 并非

下列各组药物中，属于配伍禁忌的是（）

A.巴豆与牵牛

B.丁香与三棱

C.牙硝与郁金

D.官桂与五灵脂

E.人参与石脂

以下说法错误的是（）。

A.我国目前的资质设置采用的工程监理、咨询、设计、施工分割审批的管理，而且专业类别划分过细，不利于培育和发展工程总承包企业和项目管理公司

B.建筑市场日新月异，工程总承包模式发展的步伐大步向前，老的总承包模式正加速被取代

C.虽然我国建筑企业资质设置了总承包、专业承包、劳务分包三个层次，但总包不强、分包不专、劳务市场滞后混乱的现象仍然存在

D.目前，我国推动设计、施工一体化以及勘察设计单位改制等政策力度不够